[TechAssist] Re: RCA ctc203 commerical unit
- From: <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 30 Jan 2003 08:40:39 -0600
Ben,
Measure the cathode of cr14106 should be +155 in standby and @ +129-135 in
run. If this is going high when powered on try changing CR14101 47 volt
zener or CR14117 16 volt zener. these are both on the volt regulatort
circuit primary side of T14101
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "David Lessard" <mrfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, January 29, 2003 2:50 PM
Subject: [TechAssist] Re: RCA ctc203 commerical unit
>
> Ben, It sounds like your have a problem with +B regulation. I'm not
fimiliar
> with this chassis, can you see what makes up the regulator circuit?
> Generally, HOT collector voltage is around 125 volts, the extra 30 volts
is
> causing the x-ray protection circuit to activate and shut-down the
chassis.
>
> David Lessard
> Alexandria Electronics
> mrfixit@xxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of
> Bbenstv@xxxxxxxxxxxxx
> Sent: Wednesday, January 29, 2003 3:30 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA ctc203 commerical unit
>
>
> In a message dated 1/29/2003 2:17:04 PM Central Standard Time,
> mrfixit@xxxxxxxxxxx writes:
>
> The 155v is at turn-on for 4-5 secs. then nothing .this unit doesn't have
> standby. you can get it to run with variac.
>
> > Ben, This 155V measurement, was it taken while TV was up and running or
> not?
> >
> > David Lessard
> > Alexandria Electronics
> > mrfixit@xxxxxxxxxxx
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of
> > Bbenstv@xxxxxxxxxxxxx
> > Sent: Wednesday, January 29, 2003 2:47 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] RCA ctc203 commerical unit
> >
> >
> > This is a CTC203 chassis (com. unit) This is whats happening You turn on
> and
> > it comes up and shuts down may stay on sometimes for allittle time.
> Measured
> > h/o transistor coll. and its 155v. to high run on variac and it plays
ok.
> > Have changed Q101,102 and 103 no help. anyone had this before or some
> idea?
> >
> > Ben Daniels
> > Bens TV
> > 1703 No. Brdwy.
> > Ada, Okla. 74820
> >
> >
> >
>
>
>
>
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